The National Academies Press

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From page 65... ... 65 A p p e n d i x B Data available from the Long-Term Pavement Performance (LTPP) experiment provide valuable information on the materials, climate, and traffic of test sections with measured performance data. Read the entire page →
From page 66... ... 66 potentially live longer. Also, performance of a given pavement structure depends on traffic volume. Read the entire page →
From page 67... ... 67 Table B.2. Summary of Sections Subjected to High-Volume Traffic within GPS-6A Experiment State SHRP ID Initial Structure Thickness (in.) Read the entire page →
From page 68... ... 68 5.5-in. overlay. Read the entire page →
From page 69... ... 69 little to no cracking, low rutting and IRI values after 13 and 16 years, with 16.7 and 28.4 million ESALs, respectively. Section 47-3108 was selected for mechanistic analysis. Read the entire page →
From page 70... ... 70 Table B.7. Inventory Information of Sections with the Longest Overlay Age within GPS-7A State SHRP ID Original Pavement Typea Traffic Open Date Overlay Construction Date Overlay Thickness (in.) Read the entire page →
From page 71... ... 71 GPS 7A 0 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Overlay Age (Year) N um be r o f P ro jec ts Figure B.3. Read the entire page →
From page 72... ... 72 have very little to no cracking, low rutting and IRI values after 12 years, with 16.7 and 17.8 million ESALs, respectively. Section 13-7028 was selected for mechanistic analysis. Read the entire page →
From page 73... ... 73 Table B.10. Inventory Information of Sections with the Longest Overlay Age within GPS-7B State SHRP ID Original Pavement Typea Traffic Open Date Overlay Construction Date Overlay Thickness (in.) Read the entire page →
From page 74... ... 74 SPS 5 0 5 10 15 20 25 30 35 40 45 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Overlay Age (Year) N um be r o f P ro jec ts Figure B.5. Read the entire page →
From page 75... ... 75 Table B.13. Information of Sections with the Longest Overlay Age within SPS-5 State SHRP ID Assign Date Overlay Construction Date Overlay Thickness (in.) Read the entire page →
From page 76... ... 76 125 mm (5 in.) or more placed over an existing JPCP, JRCP, or CRCP. Read the entire page →
From page 77... ... 77 sections should range between 10 and 18 ft (as shown by the dashed horizontal lines in Figure B.7) Read the entire page →
From page 78... ... 78 Table B.16. GPS-9 Construction Events Since Overlay Became Part of LTPP Experiment Section ID Construction No. Read the entire page →
From page 79... ... 79 number of transverse cracks as a function of CRCP section. Figures B.18 and B.19 show the percent cracking as a function of overlay thickness for the CRCPs, and average crack spacing as a function of overlay thickness, respectively. Read the entire page →
From page 80... ... 80 impacT of inTerlayer design on performance. Figures B.27 and B.28 illustrate the impact of the interlayer type and thickness on transverse cracking of the overlay. Read the entire page →
From page 81... ... 81 Figure B.12. Cross sections with thick interlayer. Read the entire page →
From page 82... ... 82 JPCP overlays had transverse joint spacing of 20 ft. The distribution of bonding agent types commonly used is shown in Figure B.37. Read the entire page →
From page 83... ... 83 and PerRoad software for performance prediction. They all met the criteria of "Heavy Traffic" and "Good Performance" and promise to be "long-life" pavements. Read the entire page →
From page 84... ... 84 0 2 4 6 8 10 12 14 5.1" - 6.5" 6.6" - 8.0" 8.1" - 9.5" 9.6" - 11" Overlay Thickness Av g. Read the entire page →
From page 85... ... 85 0 20 40 60 80 100 120 140 160 8" - 9.9" 10" - 11.9" Overlay Thickness Av g. Read the entire page →
From page 86... ... 86 0 5 10 15 20 25 13-4118 40-4155 48-3569 48-3845 Section ID To ta l N o. o f P un ch -o ut s Figure B.20. Read the entire page →
From page 87... ... 87 0 0.5 1 1.5 2 2.5 3 3.5 06 -9 04 8 06 -9 04 9 06 -9 10 7 08 -9 01 9 08 -9 02 0 13 -4 11 8 18 -9 02 0 20 -9 03 7 27 -9 07 5 28 -7 01 2 31 -6 70 1 40 -4 15 5 42 -1 62 7 48 -3 56 9 48 -3 84 5 48 -9 16 7 48 -9 35 5 89 -9 01 8 Section ID Av g. Read the entire page →
From page 88... ... 88 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 5.1" - 6.5" 6.6" - 8" 8.1" - 9.5" 9.6" - 11" Overlay Thickness Av g. Read the entire page →
From page 89... ... 89 0.00 0.50 1.00 1.50 2.00 2.50 3.00 5.1" - 6.5" 6.6" - 8.0" 8.1" - 9.5" 9.6" - 11.0" Overlay Thickness Av g. Read the entire page →
From page 90... ... 90 0 2 4 6 8 10 12 14 0" 0.1" - 1.9" 2" - 3.8" > 3.9" Interlayer Thickness Av g. Read the entire page →
From page 91... ... 91 0.00 0.50 1.00 1.50 2.00 Aggregate Interlock Round Dowels Load Transfer Mechanism A vg . Read the entire page →
From page 92... ... 92 0 2 4 6 8 10 12 14 Aggregate Interlock Round Dowels Load Transfer Mechanism Av g. Read the entire page →
From page 93... ... 93 Table B.17. SPS-7 Construction Events Section ID Construction No. Read the entire page →
From page 94... ... 94 (continued on next page) 22-0708 1 1/1/1987 2 4/9/1992 Grinding surface, portland cement concrete overlay, PCC shoulder restoration. Read the entire page →
From page 95... ... 95 27-0708 1 1/1/1987 2 9/10/1990 Grinding surface, portland cement concrete overlay, longitudinal subdrains. 3 9/1/1998 Partial-depth patching of PCC pavement other than at joint. Read the entire page →
From page 96... ... 96 0 2 4 6 8 10 12 14 16 18 19 -0 70 2 19 -0 70 4 19 -0 70 6 19 -0 70 8 19 -0 75 9 22 -0 70 3 22 -0 70 5 22 -0 70 7 22 -0 70 9 27 -0 70 3 27 -0 70 5 27 -0 70 7 27 -0 70 9 29 -0 70 2 29 -0 70 4 29 -0 70 6 29 -0 70 8 29 -0 76 0 Section ID Ag e Un til D eAs si gn D at e (Y ea rs ) Figure B.34. Read the entire page →
From page 97... ... 97 4.24 4.60 4.71 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 JPCP CRCP PCP Overlay Type Av g. Read the entire page →
From page 98... ... 98 0 20 40 60 80 100 120 140 160 29-0702 29-0703 29-0704 29-0705 29-0706 29-0707 29-0708 29-0709 29-0760 Section ID To ta l N o. o f T ra ns ve rs e Cr ac ks Figure B.39. Read the entire page →
From page 99... ... 99 0 20 40 60 80 100 120 3" - 3.9" 4" - 4.9" 5" - 5.9" 6" - 6.9" Overlay Thickness A vg . Read the entire page →
From page 100... ... 100 0 1 2 3 4 5 6 7 8 9 19 -0 70 2 19 -0 70 4 19 -0 70 6 19 -0 70 8 19 -0 75 9 22 -0 70 3 22 -0 70 5 22 -0 70 7 22 -0 70 9 27 -0 70 3 27 -0 70 5 27 -0 70 7 27 -0 70 9 Section ID To ta l N o. o f P un ch -o u ts Figure B.43. Read the entire page →
From page 101... ... 101 0 1 2 3 4 5 19 -0 70 2 19 -0 70 4 19 -0 70 6 19 -0 70 8 19 -0 75 9 22 -0 70 3 22 -0 70 5 22 -0 70 7 22 -0 70 9 27 -0 70 3 27 -0 70 5 27 -0 70 7 27 -0 70 9 29 -0 70 2 29 -0 70 4 29 -0 70 6 29 -0 70 8 29 -0 76 0 Section ID A vg . P SI Figure B.46. Read the entire page →
From page 102... ... 102 Table B.18. Summary of AC LTPP Section Analyzed Experiment State SHRP ID Age (years) Read the entire page →

From page 65...

... 65 A p p e n d i x B Data available from the Long-Term Pavement Performance (LTPP) experiment provide valuable information on the materials, climate, and traffic of test sections with measured performance data.